The Dormition of the Virgin by El Greco. Very, very early, and showing a more directly Byzantine influence. Some time before 1567, when he left his native Crete for a decade in Italy.
The Assumption of the Virgin, also by the hand of Domenikos. Completed in 1579, and definitely the mature Toledan EG we all know and had better love if we chose to comment on the Greek hereabouts. :)